title: Biomechanical evaluation of an orthodontic mini-implant with plastic removal cap: an in-vitro experimental testing.
abstract: This study evaluates the biomechanical interactions of a mini-implant using a plastic revolving cap (PRC) with translation/rotation features for optional orthodontic traction. An orthodontic mini-implant and the PRC consisting of a hexagon connection onto mini-implant with 60 degree switching unit and an extended arm to provide orthodontic wire tied at different positions. The PRC removal force was measured by pull-out testing. The PRC removal force remained larger than three times the finger pulling force (9.3N) after 5 repeated removal tests. The results for the PRC resistant testing showed that the PRC rotational resistant force (20.31±0.83N) is larger than the maximum traction force (about 4.9N) for orthodontic treatment. The mini-implant used with PRC can provide translation and rotation features to change the angles and directions of orthodontic tractions for most effective anchorage preparation under safety consideration.
authors.forename: Yang-Sung
authors.initials: YS
authors.lastname: Lin
authors.forename: Chun-Li
authors.initials: CL
authors.lastname: Lin
authors.forename: Wen-Jen
authors.initials: WJ
authors.lastname: Chang
authors.forename: Yen-Hsiang
authors.initials: YH
authors.lastname: Chang
authors.forename: Jian-Hong
authors.initials: JH
authors.lastname: Yu
authors.forename: Yau-Zen
authors.initials: YZ
authors.lastname: Chang
mesh_terms: D001696:Biomechanical Phenomena; D015921:Dental Implants; D052280:Orthodontic Anchorage Procedures; D016382:Orthodontic Appliance Design; D010969:Plastics; D012399:Rotation
chemical_list: D015921:Dental Implants; D010969:Plastics